Can someone explain to me why OKW still doesn't have the ability to build caches?
I get why the didn't have them at release due to truck abilities... but that was removed a long time ago. So... why?
The reasons are a few, first off is original design, the OKW are meant to portray the 1944 German Army pushing through Ardennes, altho nobody can still explain why exactly they're lacking some better support weapons.
So that would mean low resources, they had to salvage a lot and so forth, hence the salvage ability for OKW Infantry.
Then we have their design choices, which were those "truck abilities" you mention, after which they were removed the OKW resource gathering was standardized to that of the other Armies.
Next up we come to the King Tiger, which is the only default heavy tank available to anyone, one might argue that the British have the Comets and Churchills without a doctrine however, I would consider the Comet more of an upgrade to the Cromwell, so a bit better performance, rather than it being a fully-fledged heavy tank, and the Churchill is more of a meatshield/breakthrough/infantry support tank, slow, heavily armored, has a mediocre gun found on most medium tanks so nothing special there, but I would say that it makes a great meatshield for Fireflies and it farting smoke makes it great for providing support to infantry.
So all in all, right now, they probably don't have caches because of the salvage ability and King Tiger.
One possible way of keeping it unique but still having a way to "secure" a territory in order to get more sources is with the 223 Command Car which I already suggested, just given the ability to capture as well as lock down in territory similarly to the Wehrmacht Opel Blitz supply truck, that's all.